A great innovator he is credited with having helped develop the kicking system used in most hapkido schools today.
[1] Master Kim apparently took the concepts from very basic kicks he had learned from Choi and went to a temple to work on developing them to a much greater degree.
Later, in 1961, Kim travelled to Seoul and while staying at Master Ji Han-jae's Sung Moo Kwan dojang they finalized the kicking curriculum.
[2] Originally a member of the Korea Kido Association, the organization sent Master Kim to teach hapkido in the United States in 1969.
Later he combined this organization with the groups led by Ji Han-jae and Myung Jae-nam to form the Republic of Korea Hapkido Association.